bipolar + PMS = can i do anything right?

[freshnesschronic]

ok. girlfriend of 2 years. shes senior in hs, im freshman in college. long distance relationship always a problem for everyone. but we've made it and we're still very committed and in love.

but this week--is my finals week. and this is right before her period. but it's been right before her period----for a week and half! so she can't get over her bitchiness and bipolarity! because her period hasn't started! so we've fought everyday this week over the MINISCULEST of things. and then she blows up. and her only response to me is "." or "..." or "NO". seriously.
then today she blows up the worst i've ever seen. i try telling her she has pms and is majorly overreacting. then it seems like she realizes it--but doesnt care. she says "this is really who i am." she says this is who i want to be sometimes. but i cant, i have to submissive, i have to be nice. sometimes i just want to fucking be like this!" Right now i know she's out of control but all i can do is give her HOURS of time, cause bipolar + pms = can i do anything right?
Is there a better way to let her know she's being a total bitch?
I really want to work things out, because when we aren't good between us, I'm not good with myself. Therefore studying for chem tomorrow is probably as useful as shoveling snow into my room--thats how i see it. I honestly cannot do anything without knowing that we're ok.
Any ideas on how to tell her how to improve, or how I can improve my communication of the situation?

-J